Subject: Re: [RFC PATCH 1/12] memory-hotplug : rename remove_memory to offline_memory

From: Wen Congyang <[email-masked]>
Date: Wed, 27 Jun 2012 15:14:41 +0800

At 06/27/2012 01:42 PM, Yasuaki Ishimatsu Wrote:
> remove_memory() does not remove memory but just offlines memory. The patch
> changes name of it to offline_memory().

There are 3 functions in the kernel:
1. add_memory()
2. online_pages()
3. remove_memory()

So I think offline_pages() is better than offline_memory().

Thanks
Wen Congyang
> 
> CC: Len Brown <[email-masked]>
> CC: Benjamin Herrenschmidt <[email-masked]>
> CC: Paul Mackerras <[email-masked]>
> CC: Christoph Lameter <[email-masked]>
> Cc: Minchan Kim <[email-masked]>
> CC: Andrew Morton <[email-masked]>
> CC: KOSAKI Motohiro <[email-masked]>
> CC: Wen Congyang <[email-masked]>
> Signed-off-by: Yasuaki Ishimatsu <[email-masked]>
> 
> ---
>  drivers/acpi/acpi_memhotplug.c |    2 +-
>  drivers/base/memory.c          |    4 ++--
>  include/linux/memory_hotplug.h |    2 +-
>  mm/memory_hotplug.c            |    6 +++---
>  4 files changed, 7 insertions(+), 7 deletions(-)
> 
> Index: linux-3.5-rc4/drivers/acpi/acpi_memhotplug.c
> ===================================================================
> --- linux-3.5-rc4.orig/drivers/acpi/acpi_memhotplug.c	2012-06-25 04:53:04.000000000 +0900
> +++ linux-3.5-rc4/drivers/acpi/acpi_memhotplug.c	2012-06-26 13:48:38.263940481 +0900
> @@ -318,7 +318,7 @@ static int acpi_memory_disable_device(st
>  	 */
>  	list_for_each_entry_safe(info, n, &mem_device->res_list, list) {
>  		if (info->enabled) {
> -			result = remove_memory(info->start_addr, info->length);
> +			result = offline_memory(info->start_addr, info->length);
>  			if (result)
>  				return result;
>  		}
> Index: linux-3.5-rc4/drivers/base/memory.c
> ===================================================================
> --- linux-3.5-rc4.orig/drivers/base/memory.c	2012-06-25 04:53:04.000000000 +0900
> +++ linux-3.5-rc4/drivers/base/memory.c	2012-06-26 13:48:46.072842803 +0900
> @@ -266,8 +266,8 @@ memory_block_action(unsigned long phys_i
>  			break;
>  		case MEM_OFFLINE:
>  			start_paddr = page_to_pfn(first_page) << PAGE_SHIFT;
> -			ret = remove_memory(start_paddr,
> -					    nr_pages << PAGE_SHIFT);
> +			ret = offline_memory(start_paddr,
> +					     nr_pages << PAGE_SHIFT);
>  			break;
>  		default:
>  			WARN(1, KERN_WARNING "%s(%ld, %ld) unknown action: "
> Index: linux-3.5-rc4/mm/memory_hotplug.c
> ===================================================================
> --- linux-3.5-rc4.orig/mm/memory_hotplug.c	2012-06-25 04:53:04.000000000 +0900
> +++ linux-3.5-rc4/mm/memory_hotplug.c	2012-06-26 13:48:46.072842803 +0900
> @@ -990,7 +990,7 @@ out:
>  	return ret;
>  }
> 
> -int remove_memory(u64 start, u64 size)
> +int offline_memory(u64 start, u64 size)
>  {
>  	unsigned long start_pfn, end_pfn;
> 
> @@ -999,9 +999,9 @@ int remove_memory(u64 start, u64 size)
>  	return offline_pages(start_pfn, end_pfn, 120 * HZ);
>  }
>  #else
> -int remove_memory(u64 start, u64 size)
> +int offline_memory(u64 start, u64 size)
>  {
>  	return -EINVAL;
>  }
>  #endif /* CONFIG_MEMORY_HOTREMOVE */
> -EXPORT_SYMBOL_GPL(remove_memory);
> +EXPORT_SYMBOL_GPL(offline_memory);
> Index: linux-3.5-rc4/include/linux/memory_hotplug.h
> ===================================================================
> --- linux-3.5-rc4.orig/include/linux/memory_hotplug.h	2012-06-25 04:53:04.000000000 +0900
> +++ linux-3.5-rc4/include/linux/memory_hotplug.h	2012-06-26 13:48:38.264940468 +0900
> @@ -233,7 +233,7 @@ static inline int is_mem_section_removab
>  extern int mem_online_node(int nid);
>  extern int add_memory(int nid, u64 start, u64 size);
>  extern int arch_add_memory(int nid, u64 start, u64 size);
> -extern int remove_memory(u64 start, u64 size);
> +extern int offline_memory(u64 start, u64 size);
>  extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn,
>  								int nr_pages);
>  extern void sparse_remove_one_section(struct zone *zone, struct mem_section *ms);
> 
> 
> 
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